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Collections are a way for you to organize kata so that you can create your own training routines. Every collection you create is public and automatically sharable with other warriors. After you have added a few kata to a collection you and others can train on the kata contained within the collection.
Get started now by creating a new collection.
Think about a certain greek symbol...
Even the spaces count, try to reduce every unnecessary spaces. Also search code golfing. That gave me the final push :)
There are different types of functions. Try searching for it online.
How do you do it without return statement?